Schwaerzel Martin, Monastirioti Maria, Scholz Henrike, Friggi-Grelin Florence, Birman Serge, Heisenberg Martin
Lehrstuhl für Genetik und Neurobiologie, Biozentrum, Am Hubland, D-97074 Würzburg, Germany.
J Neurosci. 2003 Nov 19;23(33):10495-502. doi: 10.1523/JNEUROSCI.23-33-10495.2003.
The catecholamines play a major role in the regulation of behavior. Here we investigate, in the fly Drosophila melanogaster, the role of dopamine and octopamine (the presumed arthropod homolog of norepinephrine) during the formation of appetitive and aversive olfactory memories. We find that for the formation of both types of memories, cAMP signaling is necessary and sufficient within the same subpopulation of mushroom-body intrinsic neurons. On the other hand, memory formation can be distinguished by the requirement for different catecholamines, dopamine for aversive and octopamine for appetitive conditioning. Our results suggest that in associative conditioning, different memories are formed of the same odor under different circumstances, and that they are linked to the respective motivational systems by their specific modulatory pathways.
儿茶酚胺在行为调节中起主要作用。在此,我们以果蝇为研究对象,探究多巴胺和章鱼胺(推测为节肢动物体内去甲肾上腺素的同源物)在形成嗅觉偏好性和厌恶性记忆过程中的作用。我们发现,对于这两种类型记忆的形成,cAMP信号传导在蘑菇体固有神经元的同一亚群中是必要且充分的。另一方面,记忆形成可通过对不同儿茶酚胺的需求来区分,厌恶性记忆形成需要多巴胺,而偏好性条件反射需要章鱼胺。我们的研究结果表明,在联想性条件反射中,相同的气味在不同情况下会形成不同的记忆,并且它们通过各自特定的调节途径与相应的动机系统相联系。